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  • Articles: DFG German National Licenses  (2)
  • 05A05  (1)
  • Colotois pennaria  (1)
  • Erannis defoliaria (Z,Z,Z)-3,6,9-nonadecatriene  (1)
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  • Articles: DFG German National Licenses  (2)
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  • 1
    Electronic Resource
    Electronic Resource
    Card shuffling and a transformation on S n (1992)
    Springer
    Aequationes mathematicae 44 (1992), S. 11-34 
    Details
    ISSN: 1420-8903
    Keywords: 05A05
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Notes: Summary We consider two card shuffling schemes. The first, which has appeared in the literature previously ([G], [RB], [T]), is as follows: start with a deck ofn cards, and pick a random tuplet ∈ { 1, 2, ⋯, n} n ; interchange cards 1 andt 1, then interchange cards 2 andt 2, etc. The second scheme, which can be viewed as a transformation on the symmetric groupS n , is given by the restriction of the former shuffling scheme to tuplest which form a permutation of {1, 2,⋯,n}. We determine the bias of each of these shuffling schemes with respect to the sets of transpositions and derangements, and the expected number of fixed points of a permutation generated by each of these shuffling schemes. For the latter scheme we prove combinatorially that the permutation which arises with the highest probability is the identity. The same question is open for the former scheme. We refute a candidate answer suggested by numerical evidence [RB].
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01834201
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Electrophysiological and chemical analysis of sex pheromone communication system of the mottled umber,Erannis defoliaria (Lepidoptera: Geometridae) (1990)
    Springer
    Journal of chemical ecology 16 (1990), S. 1887-1897 
    Details
    ISSN: 1573-1561
    Keywords: Erannis defoliaria (Z,Z,Z)-3,6,9-nonadecatriene ; (Z,Z)-3,9-cis-6,7-epoxy-nonadecadiene ; sex pheromone ; identification ; electroantennogram ; single sensillum ; peripheral inhibitor ; Agriopis marginaria ; Colotois pennaria ; Lepidoptera ; Geometridae
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract (Z,Z,Z)-3,6,9-nonadecatriene (Z3,Z6,Z9–19Hy) and (Z,Z)-3,9-cis-6,7-epoxy-nonadecadiene (Z3,Z9-cis-6,7-epo-19Hy) were identified in pheromone gland extracts from femaleErannis defoliaria. The two components were found in a 1∶3 ratio, with the main component,Z3,Z9-cis-6,7-epo-19Hy present at an amount of about 1.5 ng per female. The components were identified by means of gas chromatography-mass spectrometry, gas chromatography-electroantennography and gas chromatography-single sensillum recordings. Single sensillum measurements on the male antenna showed two physiological types of sensilla. One type was characterized by a large spike amplitude cell responding toZ3,Z9-cis-6,7-epoxy-19Hy and a small spike amplitude cell responding toZ3,Z6,Z9–19Hy. A second type responded only with a large spike amplitude cell to the epoxide, and this cell was inhibited by the triene. Of the two pheromone components, the epoxide gave the higher response in the EAG tests. Preliminary field tests support the identification of the pheromone components. The epoxide was also found to be present in the extract of the pheromone gland ofColotois pennaria, and males ofC. pennaria andAgriopis marginaria were trapped by the mixture of the identified compounds.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01020502
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    Paper (German National Licenses)
    Fulltext
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